Cox, D. L. ; Jarrell, M. ; Jayaprakash, C. ; Krishnamurthy, Hulikal Ramaiyengar ; Deisz, J. (1989) Virtual electric quadrupole fluctuations: a mechanism for high Tc Physical Review Letters, 62 (18). pp. 2188-2191. ISSN 0031-9007
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Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.62.218...
Related URL: http://dx.doi.org/10.1103/PhysRevLett.62.2188
Abstract
We present the first detailed study of a mechanism for high-Tc superconductivity where oxygen-hole pairing is mediated via the exchange of virtual fluctuations of copper electric quadrupole moments. The excitation scale Δ0.1-0.5 eV is large enough for high Tc, but the interaction is still significantly retarded. This mechanism explains the absence of superconductivity in doped La2NiO4, the pressure dependence of Tc, and the different character of 60-K and 90-K phases of YBa2Cu3O7-δ (through filling-dependent gap nodes). Experimental tests of the model are proposed.
| Item Type: | Article |
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| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 17601 |
| Deposited On: | 16 Nov 2010 13:00 |
| Last Modified: | 17 May 2016 02:13 |
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